Thermal local quantum uncertainty in a two-qubit-superconducting system under decoherence

TL;DR

This paper investigates how thermal local quantum uncertainty (LQU) in a two-qubit superconducting system is affected by Hamiltonian parameters and decoherence, revealing sudden transitions and potential for quantum device applications.

Contribution

It demonstrates how to control thermal LQU via Hamiltonian parameters and analyzes the effects of decoherence, offering insights for quantum computing and quantum battery design.

Findings

Thermal LQU can be increased by tuning Hamiltonian parameters.

LQU undergoes sudden transitions at specific temperatures.

Decoherence impacts the thermal LQU dynamics.

Abstract

By considering the local quantum uncertainty (LQU) as a measure of quantum correlations, the thermal evolution of a two-qubit-superconducting system is investigated. We show that the thermal LQU can be increased by manipulating the Hamiltonian parameters such as the mutual coupling and Josephson energies, however, it undergoes sudden transitions at specific temperatures. Furthermore, a detailed analysis is presented regarding the impact of decohering channels on thermal LQU. This controllable LQU in engineering applications can disclose the advantage enabled in the superconducting charge qubits for designing quantum computers and quantum batteries.